bit like when people change fronts to 312's...you drive the car and the 80% of the braking it applies (if it is actually 80%) feels better..well i increased the rear size (bigger disc ,bigger caliper ) and the 20% braking it applied felt better than before..

:yes:

Edited 25 May, 201016 yr by warwick hunt

bit like when people change fronts to 312's...you drive the car and the 80% of the braking it applies (if it is actually 80%) feels better..well i increased the rear size (bigger disc ,bigger caliper ) and the 20% braking it applied felt better than before..

:yes:

As long as the rear wheels don't lock additional rear braking should add a modicum of stability.

:yes:

My car doesnt have abs so pretty sure I'd notice the car locking up quicker with better rear brakes, also even with abs thats not too harsh (my passat and Audi 90 Quattro the back brakes rarely triggered the abs before the fronts as with only 20% or so wasnt strong enough. On the other note I've got an Induction kit and I couldn't believe the difference in power I'd never rated them before but low down take offs etch the car seems derestricted more freely reving, higher revs not much power gain. the car will wheelspin now where it wouldn't before surley thats proof it works to some extent.

My car doesnt have abs so pretty sure I'd notice the car locking up quicker with better rear brakes, also even with abs thats not too harsh (my passat and Audi 90 Quattro the back brakes rarely triggered the abs before the fronts as with only 20% or so wasnt strong enough. On the other note I've got an Induction kit and I couldn't believe the difference in power I'd never rated them before but low down take offs etch the car seems derestricted more freely reving, higher revs not much power gain. the car will wheelspin now where it wouldn't before surley thats proof it works to some extent.

when i mess with air intake, standart ECU maps couldn't deal with it on TDi. Petrol doesn't have MAF I guess, just temperature sensor of air intake. More air in engine more power you get.

i wonder why you upgrade for 312 disc. it is floating 1 pot caliper anyway. wouldn't be better change it for real brakes 2-8pots like BREMBO, AP Racing and so on.

Edited 26 May, 201016 yr by sniper29a

when i mess with air intake, standart ECU maps couldn't deal with it on TDi. Petrol doesn't have MAF I guess, just temperature sensor of air intake. More air in engine more power you get.

Thats a shame Was looking to get a TDI next and was going to transfer the filter. I do agree with you on the bit about most people stamp on brakes and abs kicks in though so upgraded brakes wont help in an emergency or slippy road surface. I did notice My audi 90 Quattro rear brake disks corroading not being used enough but when I drove it hard They shined up especialy when the fronts got hot and started to fade.(I was young and stupid)

i wonder why you upgrade for 312 disc. it is floating 1 pot caliper anyway. wouldn't be better change it for real brakes 2-8pots like BREMBO, AP Racing and so on.

The only thing I can think is more mass better heat dissapation possibly bigger pads, or looks. Tyres usualy let me down first then brake fade or with cars that have vulgar abs that kick in to soon to hard.

Thats a shame Was looking to get a TDI next and was going to transfer the filter. I do agree with you on the bit about most people stamp on brakes and abs kicks in though so upgraded brakes wont help in an emergency or slippy road surface. I did notice My audi 90 Quattro rear brake disks corroading not being used enough but when I drove it hard They shined up especialy when the fronts got hot and started to fade.(I was young and stupid)

you can switch off ABS and having fun ;-) i barely use brakes so they don't matter to me so much. drivetrain is more important for me. that is first and most likely last upgrade from factory tune. i am not one of dyno masturbators so i prefer to enjoy ride during traveling. my next project will be conical filter on TDi, but it needs remap of ECU to benefit from it !!! Otherwise, you will lose power instead. There is MAF sensor and exhaust gases back pipe. MAF sensor measures air pressure and mass flow. If you keep same diameter of inlet pipe, it may works without modifications. I think K&N does induction kit for Fabia RS, but it has got larger diameter of intake manifold. BTW TDi is family/traveling car ;-)

The only thing I can think is more mass better heat dissapation possibly bigger pads, or looks. Tyres usualy let me down first then brake fade or with cars that have vulgar abs that kick in to soon to hard.

most heat suppose to be transfered via brakepads to brake fluid. inner ventilation/grooves of disk helps too. OEM brakes have got just one pot, so there is very poor heat dissipation. soft pads has got quick bit point, but fade off soon. hard pads need high operating temperature which you can achieve only on track days. if you want to brake hard, you need racing pads which start to work at operating temps of 600 degs of C. OEM pads make lots of dust only as I have noticed so far :-) Also "magic universal" pads work only on paper. Doesn't exist universal think ;-)

Edited 26 May, 201016 yr by sniper29a

These rear discs are 3 years old, I took them off cleaned them up, and popped them back on again.

I cover about 6,000 miles a year, and not a heavy braker, even so pads do-not use full width of disc to allow this corrosion take place.

For those who do upgrade rear brakes, is all the disc surface used ??

Please note braking efficiency unaffected with my clean up job, tested hard braking on quiet road.

Edited 26 May, 201016 yr by giandougl

no...using 256 vented and thers still a 3-4mm lip..